package com.shuzhi.dataway.util;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * @author Siyuan.mlq
 * @version 1.0
 * @since 2020年10月21日
 */
@Component
public class SpringUtil implements ApplicationContextAware {
  private static ApplicationContext applicationContext = null;

  public SpringUtil() {}

  @Override
  public void setApplicationContext(ApplicationContext arg0) throws BeansException {
    if (applicationContext == null) {
      applicationContext = arg0;
    }
  }

  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  public static void setAppCtx(ApplicationContext webAppCtx) {
    if (webAppCtx != null) {
      applicationContext = webAppCtx;
    }
  }

  /** 拿到ApplicationContext对象实例后就可以手动获取Bean的注入实例对象 */
  public static <T> T getBean(Class<T> clazz) {
    return getApplicationContext().getBean(clazz);
  }

  public static <T> T getBean(String name, Class<T> clazz) throws ClassNotFoundException {
    return getApplicationContext().getBean(name, clazz);
  }

  public static final Object getBean(String beanName) {
    return getApplicationContext().getBean(beanName);
  }

  public static final Object getBean(String beanName, String className)
      throws ClassNotFoundException {
    Class clz = Class.forName(className);
    return getApplicationContext().getBean(beanName, clz.getClass());
  }

  public static boolean containsBean(String name) {
    return getApplicationContext().containsBean(name);
  }

  public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
    return getApplicationContext().isSingleton(name);
  }

  public static Class<?> getType(String name) throws NoSuchBeanDefinitionException {
    return getApplicationContext().getType(name);
  }

  public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
    return getApplicationContext().getAliases(name);
  }
}
